Combined gas oven and heat control therefor



Oct. 25, 1932. J. M. KISSELLE COMBINED'GAS OVEN AND HEAT CONTROL THEREFOR Filed March 3, 1930 IN VEN TOR. I 54w M, 4 4552:

ATTORNEY.

Patented Oct. 25, 1932 UNITED STATES PATENT. OFFICE JOHN M. KISSELLE, OF DETROIT, MICHIGAN, ASSIGN OR TO THE DETROIT VAPOR STOVE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN COMBINED GAS OVEN AND HEAT CONTROL THEREFOR Application filed March 3,

This invention relates to a combined gas oven and heat control therefor, and has to do particularly with a novel manner of mounting the heat control and positioning the heat responsive element thereof.

Heretofore in gas stoves of the better type, it has been the practice to mount the thermostatically operated valve structure or the handle controlling the same adjacent the front inner corner of the oven. Some constructions have placed the valve actuating means at the front of the oven while most commer cial installations have conveniently placed this control member on the inner side but near 5 the top and front of the oven so as to make it very convenient for the operator to adjust the control lever or control wheel, as desired. Although not so serious an objection as to offset the convenience of positioning the valve control means near the front of the oven, the positioning of the heat responsive means in what has been termed the.cool zone. has been a detriment, due to an occasional opening of the oven door.

It is the object of the present invention to position the valve housing or at least the con trol member for the thermostatically actuated unit at a convenient position adjacent the inner upper side of the oven and to so arrange this housing or member relative to the oven as to overcome the objection of positioning the heat responsive elements in the cool zone.

A further object of the present invention resides in the novel design of control unit and manner of positioning the same relative to the oven panel whereby the control unit is made even more accessible than heretofore. In other words, the accessibility and visibility of the control unit has been materially improved while at the same time improving the control of the oven temperature. A further feature contemplates the positioning of the heat responsive elements at an angle to the ovendoor whereby to cut down the lagging or over-riding of the control valve and atthe same time insure eflicient regulation of i the valve if. the oven door is open for any ma- 504 terial length of time.

1930. Serial No. 432,714.

In the drawing:

Fig. 1 is a fragmentary plan view illustrating the manner of embodying the present invention in the combination of a standard stove structure.

Fig. 2 is a fragmentary sectional view taken on line 22 of Fig. 1.

The invention may be embodied in connection with any type of oven structure and is particularly adapted to what is known as a standard type gas range having a burner box and grid structure as at 1 and an oven which may be generally designated 2.

The heat control device may be of the general type disclosed in Patent No. 1,681,205 of September 11, 1928, or more specifically of the type disclosed in the copending application of Alvin G. Sherman No. 120,042, filed July 2, 1926. In general, this heat control device may be designated 3 and broadly consists of a suitable housing 4; having means for controlling the flow of gas, and suitable gas conduits 5 for conducting the gas or other vapor fuel to and from said housing. Such manner of conducting the gas to a heat con-. trol housing is well known in the art and is specifically illustrated and described in the above mentioned patent.

The inner side Wall of the oven may be designated 6 and this side wall instead of being flush, as in standard construction, is embossed or formed with a projecting portion 7. This extension 7 may be provided with an angular rear wall 8 and a front wall 9 and such extension may be so formed in the Wall of the oven as to extend downwardly substantially to the grate top or may be so pressed out as to only provide for the housing 4, as best shown in dotted lines as at 10.

The front wall 9 of the extension 7 is preferably provided with an opening 11 of a size sufficient to receive a cap 12 forming a part of the valve housing. The housing 4 may be provided with a suitable partition 13 and a self-aligning valve assembly including 95 the valve member 14: and an actuating stem 15.

Fuel is supplied to one side of this valve member by one of the conduits 5 and is taken away from the other side of the valve by 190 another conduit 5. These conduits 5 may extend vertically downward, as shown in Fig. 2, in the event that the extension 7 extends substantially the height of the oven, or in case the extension 7 is of a height only sufficient to accommodate the heat control unit then the conduits may be distorted as shown in dotted lines, or the heat control device may have such depth that the conduits are positioned closer to the oven lining.

The oven may or may not be provided with a lining as at 16, but if such lining is used, it may be embossed as at 17 so as to provide suitable apertured shoulders for'bolt members to assist in clamping the heat control housing in place. Such bolts 17 are not necessary, however, as if desired the unit 3 may be clamped in place as best shown in Fig. 1, wherein the housing is shown as being provided with suitable extensions 18 for receiving bolt members adapted to screw into suitable sockets 19 formed in a plate member 20 of the heat control unit. If this plate member 20 is positioned on one side of the face 9 and the valve housing on the other side, as best shown in Fig. 2, it will be obvious that the bolt members will clamp the two parts together and assist in positioning the same.

It will be understood that the heat control unit will be provided with a suitable heat responsive device 21 of the ordinary type togetherwith a suitable lever 22 and actuating rod 23 for adjusting the position of the heat responsive device to control the opening and closing of the valve. The rod 28 may be controlled by a knob 24 and this knob 24 may be provided with a suitable dial 25 for indicating the respective temperatures adapted to be maintained by a predetermined opening of the valve.

The important point here is the fact that the front face 9 of the extension 7 is at an angle to the wall 6 and that this angle not only determines the position of the front of the heat control device but also determines the angle at which the heat responsive member 21 projects within the oven.

It will obviously be immaterial where the heat responsive device 21 is located in the initial heating up of the oven as the usual practice is to place a thermometer at the critical point at the center of the oven, slightly to the front, whereby the heat control device can be calibrated according to the ther mometer. Thus while the dial on the front of the heat control device may indicate a temperature at the critical point or desired point in the oven of 500, the actual temperature around the heat responsive device may be much more or less than such temperature at the required point. The positioning of the heat responsive element 21 at a definite angle with respect to the front of the oven will thus not in any way effect the initial heating up of the oven.-

However, by positioning the heat responsive element so that it extends rearwardly from the control unit at the side of the oven, I have discovered that substantially all of the objections to the positioning of the thermo-actuated member in the so-called cool zone at the top front of the oven are overcome. By so angularly positioning the heat responsive element, the major portion of the same would be positioned just over the front center of the oven, which is the predetermined point of control of the oven, or in other words, is the critical point where the thermometer is placed to calibrate the heat control unit.

Enough of the heat responsive element will be positioned adjacent tothe front of the oven so as to be readily afiected by a lowering of the temperature due to the opening of the oven door but not to'such an extent as to cause a quick flare up of the burner or a relatively great lag which would effect too high a temperature at the critical part of the oven. On the other hand, if all the heat responsive element was positioned at the top front of the stove-parallel to the door, it will be obvious that a slight opening of the door would quickly affect such heat responsive element to open the supply valve and thus cause too great a temperature at the critical point of the oven.

It will thus be obvious that I have combined a heat control device with .a gas oven in such a manner as to not only preserve the convenient positioning of the control member near the front of the oven but also to position the same so as to be more readily observed and more accessible from the front of the stove. This angular positioning of the heat control unit also makes it possible to project the heat responsive element inwardly at an angle from the front door so as to maintain amore uniform temperature at the point in the' ov-en where accurate temperature is the most important.

What I claim is:

1. Oven structure for gas stoves,, eomprising an extension. formed in a vertical side wall of the oven, a heat control unit mounted within said extensions, gas supply conduits leading to and. fromsaid unit whereby to control the supply of gas to the oven burner, heat responsive means carried by the control unit and extending within the oven, said extension being so formed and said heat control u'nit being so positionedthat the front of the control unit angularly faces the front of the stove and the heat responsive 'means extends inwardly at an angleto the door of the oven and to said vertical side wall;

2. Oven structure for gas stoves, comprising a side wall formed to provide a laterally extending housing, a heat control unit mounted within said housing, actuating and indicating means forming a part of said heat control unitand positioned on the outside of said housing, said actuating and indicating means being mounted at an angle to the side wall of the oven so as to angularly face the front of the stove, and a heat responsive element for actuating said control unit extending Within the oven substantially parallel with the actuating means.

3. Oven structure for gas stoves, comprising a side Wall formed to provide an angular- 1y extending housing, a heat control unit mounted within said housing, actuating and indicating means forming a part of said heat control unit and positioned on the outside of said housing, said actuating and indicating means being mounted at an angle to the side wall of the oven so as to angularly face the front of the stove, and a heat responsive element for actuating said control unit extending within the oven, said heat responsive element being in angular alignment with said actuating and indicating means whereby it extends into the oven at an angle to the front thereof and at an angle to the side wall.

4. Oven structure for gas stoves, comprising a heat control unit mounted in a vertical side wall of the oven and adjacent the front thereof, heat responsive means for controlling the gas fiow through the heat control unit for regulating the gas flow to the oven burner, said heat responsive means extending inwardly into the oven and being positioned at an angle to the front of the oven and in substantially a horizontal plane whereby the project through the cool zone and into the space above the critical point of the oven.

5. Oven structure for gas stoves, comprising a heat control unit mounted in a vertical side wall of the oven and adjacent the front thereof, and a heat responsive element operatively connected to said heat control unit for controlling the flow of gas therethrough, said element being positioned at an angle to the front of the oven whereby a portion of the same extends through the cool zone and a portion projects into the central part .of the oven substantially in a horizontal plane.

6. Oven structure for gas stoves, comprising a vertical side wall embossed to provide an angularly extending portion, said angularly extending portion having an aperture formed in the face thereof, a heat control unit positioned on one side of said'face and actuating and indicating means forming a part of said unit and positioned on the otherside of said face, said heat control unit and said actuating and indicating means being clamped together whereby the axis thereof is positioned substantially at right angles to the angular face of said embossed portion, and a heat responsive element for said unit positioned generally in axial alignment therewith and projecting inwardly into the oven substantially in a horizontal plane. I

7. Oven structure for gas stoves comprising an oven lining, a gas supply conduit and an oven burner conduit positioned in a vertical wall of the oven, a portion of a side wall of the oven being embossed adjacent the top and front portion thereof to form a housing whose face is at an acute angle to the front of the stove, a heat control unit positioned within said housing and connected to said conduits, actuating and indicating means for said heat control unit positioned on the outside of said housing and against the face thereof, a heat responsive element directly connected to said control unit and extending substantially horizontally within the oven, said heat re sponsive element being in alignment with said actuating and indicating means and substantially at right angles to the face of the housing, the position of said housing and the angular extension of the heat responsive elementinto the oven being such that a portion of said heat responsive means extends through the cool zone of the oven and a portion extends into a space substantially above the critical point of the oven.

In testimony whereof I affix my signature.

JOHN M. KISSELLE. 

